package com.lq.schoolshop.util;


import javax.servlet.http.HttpServletRequest;
import java.net.InetAddress;
import java.net.UnknownHostException;

/**
 * @Author
 * @Date2020/10/27 20:41
 * @Version V1.0
 * 为什么努力？想把钱都赚够，一心跳广场舞曲去。
 **/
public class IpUtils {
    /**
     * 获取当前网络ip
     * @param request
     * @return
     */
    public static String getIpAddr(HttpServletRequest request){
        String ipAddress = request.getHeader("x-forwarded-for");
        if(ipAddress==null||ipAddress.length()== 0||"unknown".equalsIgnoreCase(ipAddress)){
            ipAddress=request.getHeader("Proxy-Client-IP");
        }
        if(ipAddress==null||ipAddress.length()== 0||"unknown".equalsIgnoreCase(ipAddress)){
            ipAddress = request.getHeader("WL-Proxy-Client-IP");
        }
        if(ipAddress==null||ipAddress.length()== 0||"unknown".equalsIgnoreCase(ipAddress)){
            ipAddress = request.getRemoteAddr();
            if(ipAddress.equals("127.0.0.1") || ipAddress.equals("0:0:0:0:0:0:0:1")){
                /*根据网卡取本机配置的IP  */
                InetAddress inet=null;
                try {
                    inet = InetAddress.getLocalHost();
                } catch (UnknownHostException e) {
                    e.printStackTrace();
                }
                ipAddress= inet.getHostAddress();
            }
        }
        /*对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割  */
        if(ipAddress!=null && ipAddress.length()>15){ /*"***.***.***.***".length() = 15*/
            if(ipAddress.indexOf(",")>0){
                ipAddress = ipAddress.substring(0,ipAddress.indexOf(","));
            }
        }
        return ipAddress;
    }
}
